Dipolar spin waves in uniaxial easy-axis antiferromagnets: A natural topological nodal-line semimetal
arXiv:2005.10971 · doi:10.1103/PhysRevResearch.2.023282
Abstract
The existence of the magnetostatic surface spin waves in ferromagnets, known as Damon-Eshbach mode, was recently demonstrated to originate from the topology of the dipole-dipole interaction. In this work, we study the topological characteristics of magnons in easy-axis antiferromagnets with uniaxial anisotropy. The dipolar spin waves are found to be, driven by the dipole-dipole interaction, in a topological nodal-line semimetal phase, which hosts Damon-Eshbach-type surface modes due to the bulk-edge correspondence. The long wavelength character of dipolar spin waves makes our proposal valid for any natural uniaxial easy-axis antiferromagnet, and thus enriches the candidates of topological magnonic materials. In contrast to the nonreciprocal property in ferromagnetic case, the surface modes with opposite momentum coexist at each surface, but with different chiralities. Such a chirality-momentum or spin-momentum locking, similar to that of electronic surface states in topological insulators, offers the opportunity to design novel chirality-based magnonic devices in antiferromagnets.
References in corpus (29)
- Topological Insulators
- Topological insulators and superconductors
- Weyl and Dirac Semimetals in Three Dimensional Solids
- Classification of topological insulators and superconductors in three spatial dimensions
- Topological chiral magnonic edge mode in a magnonic crystal
- Topological Magnon Insulator in Insulating Ferromagnet
- Topology of Andreev Bound States with Flat Dispersion
- Subterahertz spin pumping from an insulating antiferromagnet
- A Realization of the Haldane-Kane-Mele Model in a System of Localized Spins
- Spin wave nonreciprocity for logic device applications
- Chiral spin-wave edge modes in dipolar magnetic thin films
- Tunable magnon Weyl points in ferromagnetic pyrochlores
- Excitation of unidirectional exchange spin waves by a nanoscale magnetic grating
- Dirac magnons in honeycomb ferromagnets
- Dirac and nodal line magnons in three-dimensional antiferromagnets
- Dirac magnons in a honeycomb lattice quantum XY magnet CoTiO3
- Magnonic Weyl semimetal in pyrochlore ferromagnets
- Topological spin excitations observed in a three-dimensional antiferromagnet
- Chiral anomaly of Weyl magnons in stacked honeycomb ferromagnets
- Backscattering immunity of dipole-exchange magnetostatic surface spin waves
- Magnon nodal-line semimetals and drumhead surface states in anisotropic pyrochlore ferromagnets
- Weyl magnons in pyrochlore antiferromagnets with all-in-all-out orders
- Weyl magnons in noncoplanar stacked kagome antiferromagnets
- Topological characterization of classical waves: the topological origin of magnetostatic surface spin waves
- Finite temperature magnon spectra in yttrium iron garnet from mean field approach in tight-binding model
- Competing phases and topological excitations of spin-one pyrochlore antiferromagnets
- Chiral topological insulator of magnons
- Platform for nodal topological superconductors in monolayer molybdenum dichalcogenides
- Theory of spin and lattice wave dynamics excited by focused laser pulses
Cited by in corpus (12)
- Topological Magnons: A Review
- Chirality as Generalized Spin-Orbit Interaction in Spintronics
- Interaction-stabilized topological magnon insulator in ferromagnets
- Cavity magnon-polaritons in cuprate parent compounds
- Antiferromagnetic magnon pseudospin: Dynamics and diffusive transport
- Tunable Magnonic Chern Bands and Chiral Spin Currents in Magnetic Multilayers
- All-electrical Magnon Transport Experiments in Magnetically Ordered Insulators
- Intrinsic topological magnons in arrays of magnetic dipoles
- Magnon spin transport around the compensation magnetic field in easy-plane antiferromagnetic insulators
- Spin-orbit coupling and linear crossings of dipolar magnons in van der Waals antiferromagnets
- Dipolar spin-waves and tunable band gap at the Dirac points in the 2D magnet ErBr3
- Topological edge states in dipolar zig-zag stripes